Carbocupration of acetylenic acetals and ketals: synthesis of α-β ethylenic acetals, and of dienals and dienones
作者:A. Alexakis、A. Commercon、C. Coulentianos、J. F. Normant
DOI:10.1351/pac198355111759
日期:1983.1.1
The regio selectivity of the carbocupration reaction of substituted and non substituted e-acetylenic ketals and acetals is discussed. Lithium diorganocuprates add regio and stereoselectively. The functionalized vinyl cuprates thus obtained, can be trapped by a large variety of electrophiles : alkyl , alkenyl alkynyl and aryl halides, cunsaturated esters or ketones. The reaction is illustrated by the
讨论了取代和未取代的ε-炔缩酮和缩醛的碳铜化反应的区域选择性。二有机铜酸锂具有区域选择性和立体选择性。由此获得的官能化乙烯基铜酸盐可以被多种亲电子试剂捕获:烷基、烯基炔基和芳基卤化物、c不饱和酯或酮。该反应通过合成马尼酮、纯 E 香叶醛和 2,4-(E,Z) 二烯醛来说明。